Chaffer



Aug. 26, 1930.

wlTNEssEs 3.016) l u. M. luNz 1,773,914

CHAFFER 2 Sheets-Sheet 1 Original Filed Feb. 16, 1927 Aug. 26, 41930. J. M. LUNZ 1,773,914

' GHAFFER original Filed Feb. 1e, 192'?v 2 Sheets-sheet 2 d 5 im t y y j Inventor: wnNEssEs ma w n" i l ATTORNEY Patented Aug. 26, 1930 UNITED STATES JOE M. LUNZ, F FORD, KANSAS CHAFFER Application ledvFebruary 16, 1927, Serial No. 168,755. Renewed March 23, 19.20.

This invention relates to threshing machines and more particularly to separators therefor commonly known as chatters, and which is designed as an improvement over the F separator shown and described in my Patent No. 1,428,599 dated September 12, 1922.

A primary object of the invention is to provide a separator of this character for removing chaff. tailings and the like, which is le constructed to meet the various conditions of grain, permitting the strawracks to be made coarser, to be removed entirely or be combined with the chatters thereby increasing the capacity ofthe separator from 10 i to 25% over the system of separation now employed where an automatc'separation is required.

Another object of the invention is to provide a separator having an adjustable blast :i0 control which may be automa-tic or made stationary as desired. j j

Another object is to provide a separator employing a plurality of sets of chatters each set being composed of a plurality of screens i? and which are adjustable to meet various conditions of the grain.

1n carrying out these objects, the invention is susceptible of a wide range of modifications without departing from the spirit or :5 sacrificing any of the advantages of the claimed invention; there being shown in the .drawings for illustrative purposes a preferred and practical form, in which Figure l represents a longitudinal section 2.5 of a portion of a threshing machine with this improved separator shown applied;

Fig. 2 is a perspective view of the separator detached; j

Fig. 3 is a detail side elevation; Fig. 4 is a detail perspective viewof the blast deilector. j

In the lembodiment illustrated the chaff and grain separator shown generally at is used in connection with the thresher l of 45 conventional type having the usual grain board 9 from which the grain and tailings drop onto the separator 10. This separator is provided at its front end with an extension grain pan 11 designed for conveniently rinstalling the separator on machines of different makes and also provides for a better air control. v

The frame of this separator includes side boards l2 and 13 which extend the full length of the shoe 2 and have fixed to their inner faces cleats 12a arranged in step-like form to supporttlie screens to be described. A screen 36 is located horizontally near the bottom of shoe 2 to receive the grain which passes through the chatters of the separator and which delivers the screened grain to the are numbered 3l, 32 and 33. These screens may have frames or not, as desired and the screening elements are preferably made of perforated metal sheets. u The uppermost Screens have larger and fewer perforations While those arranged below have perforations increasing in number and decreasing in size. These screens also extend outwardly in steplilre form and are fixed to the cleats 12a at opposite sides of the separator 10.

The screens of the respective sets have longitudinally arranged spaced cleats and 25l disposed between them and extending out over the screen below operating as supports for the screens above and forming air passages in which the airis directed straight through the space between the screens in case of a side draft. Y

The bottom screen 23 of the set 20 has a rearwardly extending hinged perforated cxtension plate 2G with upstanding end members 27 provided with slots 28 through which bolts 29 pass and engage the side members 12 and 13 for adjustably securing said screen extension 26. This adjustable plate 26 has its rear end overlying the front edge of theV uppermost screen 31 of set 30.

The rear.lower screen 33 of set 30 has hingedlv connected thereto kan extension screen 34 provided with upstanding end members slotted asshown at 42 to receive bolts 43 for adjustably securing it to upstanding plates 39 mounted on the side boards l2 and 13. The side plates 39 ot the chafler set 30 are also slotted as shown at ll5 for the passage oi' bolts 46 to adjustably tasten set 30 at its front end to the side boards 1Q and 13, of the chatter frame, a series of bolt holes 44 being formed on boards l2 and 13 to provide for this adjustment.

A blast defiector 50 is located at the front end of chaiier between it and chatter 2O and has rearwardly extending slotted links 5l slidably engaged with the cleats E25 between screens l and 32. Links 52 are pivotailjr connected at one end with the rear ends of links 5l and are apertured at their ree ends as shown at 5) to engage with iingers 54 carried by a rod J5 rotatably mounted 1n a bearing 34 on the rear end ot screen 3i-l. The turning of this rod ep ttes to shi'it the blast defiector 50 longitudinly oit the chatier. Fixed to one end o the rod which is oset to form a crank arm is a strap 57 to which is connected a coiled spring 56. An eyebolt 59 is connected. with the other end of said spring and passes loosely through an apertured ear 60 ot' a bracket 6l secured to the outer face of the side board of shoe 2. This bolt 59 is ctluipped with a nut for adjusting the tension et' the springs, to permit the blast control 5() to operate automatically or to be l'ixed stationary as may be ydesired. The crank arm 55 passes through aslot 6Ul ot bracket 5l to provide for the partial oscillation of the rod and the consequent movement ot' the deiiector 50. It will thus be seen that the blast control 50 is regulated by the tension of the spring 56 the spring operating to give and take as the air of the fan is applied against the detlector 50 according to variations of speed of the machine. This permits the fan doors to be clear open at all times since the second set of drops do not handle the amount oi grain, chaii' and straw as the front chatl'ers do. It is, of course, understood that the blast control delector 50 may be kept stationary, it' desired, by adjustment of the nuts and bolts with which the spring is connected.

The extension screen plate 34 is designed to receive the short tailings ot wheat which do not pass through the stub chatters and discharge them int-o the elevator 38 by which they are conveyed back to the cylinder and concave of the thresher.

The same windboard all is used in connection with this separator as is shown in my patent above referred to and is adjustable to any ydesired angle by means of the handle 48 to provide for controlling the blast of air from the fan or blower 401k The use of this improved separator assures separating ot all the grain on its first passage through the threshing machine so that nothing but stems, white caps and small particles such as are not blown out through the chatler are returned to the cylinder to be threshed again.

Without further description it is thought that the features and advantages of the invention will be readily a )parent to those skilled in the art, and it will oif course be undei-stood that changes in the form, proportion and minor details i construction may be resorted to, without departing from the spirit ot the invention -or its scope as claimed.

I claim l. In a threshing niahinc, the combination with a shoe; ot a plurality of sets ot stub chailors mounted therein, one in advance of the other and each adjustable independently of' the other, and an air blast cont-rol connected with one set oi: said chalfers and located between the sets.

2. In a threshing); machine, the combination with a shoe; oi a plurality oi" sets ot stub chatters mounted therein, one in advance of the other and each adjustable independently olf the other, and an air blast control located between the sci; ot chatters, and means waere by said control may operate automatically by the force ot the blast or be held lined.

3. In a threshing machine, the combination with a shoe; oi' a plurality of sets oi' stub chaiiers moiu'ited therein one in advance of the other, the screens of each set being arranged in step-lilre Vtorni one above the other, and a perror-ated extension plate connecting the lowerinost screen of one chatter setwith the top screen ot the other set.

4. ln a threshing machiir the ceinbination with a shoe; ci a plurality of sets of stub chaii'ers niounted therein, I'. in advance oit the other, and each pcndently of the other, ing perforated plates betweeiii chatters being adapted to be lcc the shoe bel-aw the top thereof.

5. In a threshing mach ie the combination with a shoe; of a plurality or sets of stub chaiiers mounted therein one in advance ot the other, the screens ot each set being arranged in step-like form one Jove the other, and a perforated eatension plate liingedly connected with the lower-most screen oi one set and overlyingl the nppern'iost screen of the other set, siid hr4 edl` connected screen or extension C'creen i jnstablymounted to vary the inclination thereoit.

JOE M. LUNZ. 

